Bernal-Sprekelsen M; Alobi I; Ensenat J; et al. Endoscopic Approaches to the Paranasal Sinuses and Skull Base: A Step-by-Step Anatomic Dissection Guide;Thieme 2017; 434 pp; 930 ill; $159.99. In the textbook “Endoscopic Approaches to the Paranasal Sinuses and Skull Base,”